Has anyone had problems when copying a volume with a mesh and the copied mesh has inverted elements? The first mesh is fine (max skewness ~ 0.7 and about 35,000 elements) but the copied one went nuts ( >200 inverted elements, and none of the meshes on the new faces line up properly). The same problem happens whether I copy the volume using a translation, a rotation, or a reflection of the volume.

Has anyone seen this problem before, and if so, how did you get around it?